package com.mall.order.services;

import com.mall.order.OrderCoreService;
import com.mall.order.biz.TransOutboundInvoker;
import com.mall.order.biz.context.AbsTransHandlerContext;
import com.mall.order.biz.factory.OrderProcessPipelineFactory;
import com.mall.order.constant.OrderRetCode;
import com.mall.order.constants.OrderConstants;
import com.mall.order.dal.entitys.Order;
import com.mall.order.dal.entitys.OrderItem;
import com.mall.order.dal.entitys.Stock;
import com.mall.order.dal.entitys.OrderItem;
import com.mall.order.dal.entitys.OrderShipping;
import com.mall.order.dal.persistence.OrderItemMapper;
import com.mall.order.dal.persistence.OrderMapper;
import com.mall.order.dal.persistence.OrderShippingMapper;
import com.mall.order.dal.persistence.StockMapper;
import com.mall.order.dto.*;
import com.mall.order.utils.ExceptionProcessorUtils;
import com.mall.shopping.constants.ShoppingRetCode;
import lombok.extern.slf4j.Slf4j;
import org.apache.dubbo.config.annotation.Service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import tk.mybatis.mapper.entity.Example;

import java.util.Date;
import java.util.List;

/**
 *  ciggar
 * create-date: 2019/7/30-上午10:05
 */
@Slf4j
@Component
@Service(cluster = "failfast")
public class OrderCoreServiceImpl implements OrderCoreService {

	@Autowired
	OrderMapper orderMapper;

	@Autowired
	OrderItemMapper orderItemMapper;

	@Autowired
	OrderShippingMapper orderShippingMapper;

	@Autowired
    OrderProcessPipelineFactory orderProcessPipelineFactory;

	@Autowired
	StockMapper stockMapper;


	/**
	 * 创建订单的处理流程
	 *
	 * @param request
	 * @return
	 */
	@Override
	public CreateOrderResponse createOrder(CreateOrderRequest request) {
		CreateOrderResponse response = new CreateOrderResponse();
		try {
			//创建pipeline对象
			TransOutboundInvoker invoker = orderProcessPipelineFactory.build(request);

			//启动pipeline
			invoker.start(); //启动流程（pipeline来处理）

			//获取处理结果
			AbsTransHandlerContext context = invoker.getContext();

			//把处理结果转换为response
			response = (CreateOrderResponse) context.getConvert().convertCtx2Respond(context);
		} catch (Exception e) {
			log.error("OrderCoreServiceImpl.createOrder Occur Exception :" + e);
			ExceptionProcessorUtils.wrapperHandlerException(response, e);
		}
		return response;
	}

	@Transactional
	@Override
	public DeleteOrderResponse deleteOrder(DeleteOrderRequest request) {
		DeleteOrderResponse response = new DeleteOrderResponse();
		String orderId = request.getOrderId();
		Order order = orderMapper.selectByPrimaryKey(orderId);
		Integer status = order.getStatus();
		if (0 == status || 1 == status || 2 == status || 3 == status) {
			backInStock(order);
		}

		orderMapper.deleteByPrimaryKey(orderId);

		Example orderItemExample = new Example(OrderItem.class);
		orderItemExample.createCriteria().andEqualTo("orderId", orderId);
		orderItemMapper.deleteByExample(orderItemExample);

		Example orderShippingExample = new Example(OrderShipping.class);
		orderShippingExample.createCriteria().andEqualTo("orderId", orderId);
		orderShippingMapper.deleteByExample(orderShippingExample);

		response.setCode(ShoppingRetCode.SUCCESS.getCode());
		response.setMsg(ShoppingRetCode.SUCCESS.getMessage());

		return response;
	}

	private void backInStock(Order order) {
		// 根据orderId获取所有order_item
		List<OrderItem> orderItems = orderItemMapper.queryByOrderId(order.getOrderId());
		orderItems.forEach(orderItem -> {
			Stock stock = new Stock();
			stock.setItemId(orderItem.getItemId());
			stock.setLockCount(-orderItem.getNum());
			stock.setStockCount(orderItem.getNum().longValue());
			stockMapper.updateStock(stock);
		});
	}


	/**
	 * 取消订单
	 * @param request
	 * @return
	 */
	@Override
	@Transactional
	public CancelOrderResponse cancelOrder(CancelOrderRequest request) {
		CancelOrderResponse response = new CancelOrderResponse();
		try {
			Order order = new Order();
			// 根据id取消订单, 即设置订单状态为取消
			order.setOrderId(request.getOrderId());
			order.setStatus(OrderConstants.ORDER_STATUS_TRANSACTION_CANCEL);
			order.setUpdateTime(new Date());
			Integer row = orderMapper.updateByPrimaryKeySelective(order);
			if (!row.equals(1)) {
				response.setCode(OrderRetCode.ORDER_NOT_FOUND.getCode());
				response.setMsg(OrderRetCode.ORDER_NOT_FOUND.getMessage());
				return response;
			}
			// 恢复库存
			backInStock(order);
			response.setCode(OrderRetCode.SUCCESS.getCode());
			response.setMsg(OrderRetCode.SUCCESS.getMessage());
		} catch (Exception e) {
			log.error("OrderCoreServiceImpl.createOrder Occur Exception :" + e);
			ExceptionProcessorUtils.wrapperHandlerException(response, e);
		}
		return response;
	}
}
